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Commit | Line | Data |
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03467c88 | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
c2f1db8f | 3 | #pragma once |
60918275 | 4 | |
a7334b09 LP |
5 | /*** |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2010 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
11 | under the terms of the GNU Lesser General Public License as published by |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
13 | (at your option) any later version. |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 18 | Lesser General Public License for more details. |
a7334b09 | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | ***/ | |
23 | ||
31885cd5 | 24 | #include <alloca.h> |
370c860f | 25 | #include <fcntl.h> |
60918275 LP |
26 | #include <inttypes.h> |
27 | #include <time.h> | |
28 | #include <sys/time.h> | |
ec2002f8 | 29 | #include <stdarg.h> |
60918275 | 30 | #include <stdbool.h> |
5cb5a6ff | 31 | #include <stdlib.h> |
80876c20 | 32 | #include <stdio.h> |
9a34ec5f | 33 | #include <signal.h> |
82c121a4 | 34 | #include <sched.h> |
8f75a603 | 35 | #include <limits.h> |
25ea79fe | 36 | #include <sys/types.h> |
00dc5d76 | 37 | #include <sys/stat.h> |
3b63d2d3 | 38 | #include <dirent.h> |
68faf98c | 39 | #include <sys/resource.h> |
7d5e9c0f | 40 | #include <stddef.h> |
79d860fe | 41 | #include <unistd.h> |
d6dd604b | 42 | #include <locale.h> |
5862d652 | 43 | #include <mntent.h> |
eff05270 | 44 | #include <sys/socket.h> |
0254e944 | 45 | #include <sys/inotify.h> |
60918275 | 46 | |
ccd06097 | 47 | #if SIZEOF_PID_T == 4 |
3da7a50f | 48 | # define PID_PRI PRIi32 |
ccd06097 | 49 | #elif SIZEOF_PID_T == 2 |
3da7a50f | 50 | # define PID_PRI PRIi16 |
ccd06097 ZJS |
51 | #else |
52 | # error Unknown pid_t size | |
53 | #endif | |
3da7a50f | 54 | #define PID_FMT "%" PID_PRI |
ccd06097 ZJS |
55 | |
56 | #if SIZEOF_UID_T == 4 | |
57 | # define UID_FMT "%" PRIu32 | |
58 | #elif SIZEOF_UID_T == 2 | |
59 | # define UID_FMT "%" PRIu16 | |
60 | #else | |
61 | # error Unknown uid_t size | |
62 | #endif | |
63 | ||
1c231f56 LP |
64 | #if SIZEOF_GID_T == 4 |
65 | # define GID_FMT "%" PRIu32 | |
66 | #elif SIZEOF_GID_T == 2 | |
67 | # define GID_FMT "%" PRIu16 | |
68 | #else | |
69 | # error Unknown gid_t size | |
70 | #endif | |
71 | ||
de0671ee | 72 | #if SIZEOF_TIME_T == 8 |
1fa2f38f | 73 | # define PRI_TIME PRIi64 |
1f2b7175 | 74 | #elif SIZEOF_TIME_T == 4 |
de0671ee ZJS |
75 | # define PRI_TIME PRIu32 |
76 | #else | |
77 | # error Unknown time_t size | |
78 | #endif | |
79 | ||
80 | #if SIZEOF_RLIM_T == 8 | |
81 | # define RLIM_FMT "%" PRIu64 | |
82 | #elif SIZEOF_RLIM_T == 4 | |
83 | # define RLIM_FMT "%" PRIu32 | |
84 | #else | |
85 | # error Unknown rlim_t size | |
86 | #endif | |
87 | ||
a838e6a1 | 88 | #include "macro.h" |
dced1557 | 89 | #include "missing.h" |
9a98c7a1 | 90 | #include "time-util.h" |
871d7de4 | 91 | |
44d8db9e | 92 | /* What is interpreted as whitespace? */ |
4a72ff34 | 93 | #define WHITESPACE " \t\n\r" |
e3e0314b ZJS |
94 | #define NEWLINE "\n\r" |
95 | #define QUOTES "\"\'" | |
96 | #define COMMENTS "#;" | |
97 | #define GLOB_CHARS "*?[" | |
44d8db9e | 98 | |
0ce5a806 MM |
99 | /* What characters are special in the shell? */ |
100 | /* must be escaped outside and inside double-quotes */ | |
101 | #define SHELL_NEED_ESCAPE "\"\\`$" | |
102 | /* can be escaped or double-quoted */ | |
103 | #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;" | |
104 | ||
a7bc2c2a | 105 | #define FORMAT_BYTES_MAX 8 |
8b6c7120 | 106 | |
c1072ea0 | 107 | #define ANSI_HIGHLIGHT_ON "\x1B[1;39m" |
03b717a3 | 108 | #define ANSI_RED_ON "\x1B[31m" |
281605bf | 109 | #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m" |
076a24ad | 110 | #define ANSI_GREEN_ON "\x1B[32m" |
2ee68f72 | 111 | #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m" |
5f23d5b1 | 112 | #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m" |
c0fdf098 | 113 | #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m" |
61cbdc4b | 114 | #define ANSI_HIGHLIGHT_OFF "\x1B[0m" |
984a2be4 | 115 | #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K" |
61cbdc4b | 116 | |
2e857429 | 117 | size_t page_size(void) _pure_; |
37f85e66 | 118 | #define PAGE_ALIGN(l) ALIGN_TO((l), page_size()) |
119 | ||
60918275 | 120 | #define streq(a,b) (strcmp((a),(b)) == 0) |
3846aeeb | 121 | #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0) |
b43d1d01 TA |
122 | #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0) |
123 | #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0) | |
60918275 | 124 | |
44a6b1b6 | 125 | bool streq_ptr(const char *a, const char *b) _pure_; |
e05797fb | 126 | |
4b8772bf | 127 | #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n))) |
60918275 LP |
128 | |
129 | #define new0(t, n) ((t*) calloc((n), sizeof(t))) | |
130 | ||
0f0dbc46 LP |
131 | #define newa(t, n) ((t*) alloca(sizeof(t)*(n))) |
132 | ||
7629889c LP |
133 | #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n))) |
134 | ||
4b8772bf | 135 | #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n))) |
888c7102 | 136 | |
60918275 LP |
137 | #define malloc0(n) (calloc((n), 1)) |
138 | ||
139 | static inline const char* yes_no(bool b) { | |
140 | return b ? "yes" : "no"; | |
141 | } | |
142 | ||
5232c42e LS |
143 | static inline const char* true_false(bool b) { |
144 | return b ? "true" : "false"; | |
145 | } | |
146 | ||
769d324c LP |
147 | static inline const char* one_zero(bool b) { |
148 | return b ? "1" : "0"; | |
149 | } | |
150 | ||
60918275 LP |
151 | static inline const char* strempty(const char *s) { |
152 | return s ? s : ""; | |
153 | } | |
154 | ||
155 | static inline const char* strnull(const char *s) { | |
156 | return s ? s : "(null)"; | |
157 | } | |
158 | ||
04fd6fe4 LP |
159 | static inline const char *strna(const char *s) { |
160 | return s ? s : "n/a"; | |
161 | } | |
162 | ||
9beb3f4d LP |
163 | static inline bool isempty(const char *p) { |
164 | return !p || !p[0]; | |
165 | } | |
166 | ||
11adc1ae LP |
167 | static inline char *startswith(const char *s, const char *prefix) { |
168 | size_t l; | |
169 | ||
170 | l = strlen(prefix); | |
171 | if (strncmp(s, prefix, l) == 0) | |
172 | return (char*) s + l; | |
173 | ||
df89481a KS |
174 | return NULL; |
175 | } | |
176 | ||
11adc1ae LP |
177 | static inline char *startswith_no_case(const char *s, const char *prefix) { |
178 | size_t l; | |
179 | ||
180 | l = strlen(prefix); | |
181 | if (strncasecmp(s, prefix, l) == 0) | |
182 | return (char*) s + l; | |
183 | ||
df89481a KS |
184 | return NULL; |
185 | } | |
186 | ||
44a6b1b6 | 187 | char *endswith(const char *s, const char *postfix) _pure_; |
60918275 | 188 | |
5cb36f41 | 189 | char *first_word(const char *s, const char *word) _pure_; |
79d6d816 | 190 | |
42f4e3c4 | 191 | int close_nointr(int fd); |
03e334a1 | 192 | int safe_close(int fd); |
3d94f76c | 193 | void safe_close_pair(int p[]); |
03e334a1 | 194 | |
5b6319dc | 195 | void close_many(const int fds[], unsigned n_fd); |
60918275 | 196 | |
5556b5fe LP |
197 | int parse_size(const char *t, off_t base, off_t *size); |
198 | ||
44a6b1b6 | 199 | int parse_boolean(const char *v) _pure_; |
3ba686c1 | 200 | int parse_pid(const char *s, pid_t* ret_pid); |
034a2a52 LP |
201 | int parse_uid(const char *s, uid_t* ret_uid); |
202 | #define parse_gid(s, ret_uid) parse_uid(s, ret_uid) | |
85261803 LP |
203 | |
204 | int safe_atou(const char *s, unsigned *ret_u); | |
205 | int safe_atoi(const char *s, int *ret_i); | |
206 | ||
8f75a603 LP |
207 | int safe_atollu(const char *s, unsigned long long *ret_u); |
208 | int safe_atolli(const char *s, long long int *ret_i); | |
209 | ||
f7900e25 TA |
210 | int safe_atod(const char *s, double *ret_d); |
211 | ||
b914e211 LP |
212 | int safe_atou8(const char *s, uint8_t *ret); |
213 | ||
8507eb20 | 214 | #if LONG_MAX == INT_MAX |
8f75a603 LP |
215 | static inline int safe_atolu(const char *s, unsigned long *ret_u) { |
216 | assert_cc(sizeof(unsigned long) == sizeof(unsigned)); | |
217 | return safe_atou(s, (unsigned*) ret_u); | |
218 | } | |
219 | static inline int safe_atoli(const char *s, long int *ret_u) { | |
220 | assert_cc(sizeof(long int) == sizeof(int)); | |
221 | return safe_atoi(s, (int*) ret_u); | |
222 | } | |
223 | #else | |
224 | static inline int safe_atolu(const char *s, unsigned long *ret_u) { | |
225 | assert_cc(sizeof(unsigned long) == sizeof(unsigned long long)); | |
226 | return safe_atollu(s, (unsigned long long*) ret_u); | |
227 | } | |
228 | static inline int safe_atoli(const char *s, long int *ret_u) { | |
229 | assert_cc(sizeof(long int) == sizeof(long long int)); | |
230 | return safe_atolli(s, (long long int*) ret_u); | |
231 | } | |
232 | #endif | |
233 | ||
a838e6a1 LP |
234 | static inline int safe_atou32(const char *s, uint32_t *ret_u) { |
235 | assert_cc(sizeof(uint32_t) == sizeof(unsigned)); | |
236 | return safe_atou(s, (unsigned*) ret_u); | |
237 | } | |
238 | ||
8f75a603 | 239 | static inline int safe_atoi32(const char *s, int32_t *ret_i) { |
a838e6a1 | 240 | assert_cc(sizeof(int32_t) == sizeof(int)); |
8f75a603 | 241 | return safe_atoi(s, (int*) ret_i); |
a838e6a1 LP |
242 | } |
243 | ||
8f75a603 LP |
244 | static inline int safe_atou64(const char *s, uint64_t *ret_u) { |
245 | assert_cc(sizeof(uint64_t) == sizeof(unsigned long long)); | |
246 | return safe_atollu(s, (unsigned long long*) ret_u); | |
247 | } | |
034c6ed7 | 248 | |
8f75a603 LP |
249 | static inline int safe_atoi64(const char *s, int64_t *ret_i) { |
250 | assert_cc(sizeof(int64_t) == sizeof(long long int)); | |
251 | return safe_atolli(s, (long long int*) ret_i); | |
252 | } | |
034c6ed7 | 253 | |
781fa938 LP |
254 | int safe_atou16(const char *s, uint16_t *ret); |
255 | int safe_atoi16(const char *s, int16_t *ret); | |
256 | ||
a2a5291b | 257 | const char* split(const char **state, size_t *l, const char *separator, bool quoted); |
a41e8209 | 258 | |
034c6ed7 | 259 | #define FOREACH_WORD(word, length, s, state) \ |
bf85c24d | 260 | _FOREACH_WORD(word, length, s, WHITESPACE, false, state) |
65d2ebdc LP |
261 | |
262 | #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \ | |
bf85c24d | 263 | _FOREACH_WORD(word, length, s, separator, false, state) |
a41e8209 | 264 | |
034c6ed7 | 265 | #define FOREACH_WORD_QUOTED(word, length, s, state) \ |
bf85c24d SP |
266 | _FOREACH_WORD(word, length, s, WHITESPACE, true, state) |
267 | ||
bf85c24d | 268 | #define _FOREACH_WORD(word, length, s, separator, quoted, state) \ |
a2a5291b | 269 | for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted))) |
034c6ed7 | 270 | |
034c6ed7 LP |
271 | pid_t get_parent_of_pid(pid_t pid, pid_t *ppid); |
272 | ||
44d8db9e | 273 | char *strappend(const char *s, const char *suffix); |
fab56fc5 LP |
274 | char *strnappend(const char *s, const char *suffix, size_t length); |
275 | ||
276 | char *replace_env(const char *format, char **env); | |
277 | char **replace_env_argv(char **argv, char **env); | |
44d8db9e | 278 | |
849958d1 | 279 | int readlinkat_malloc(int fd, const char *p, char **ret); |
87f0e418 | 280 | int readlink_malloc(const char *p, char **r); |
9a67bcf2 | 281 | int readlink_value(const char *p, char **ret); |
2c7108c4 | 282 | int readlink_and_make_absolute(const char *p, char **r); |
83096483 | 283 | int readlink_and_canonicalize(const char *p, char **r); |
87f0e418 | 284 | |
2a987ee8 | 285 | int reset_all_signal_handlers(void); |
1dedb74a | 286 | int reset_signal_mask(void); |
2a987ee8 | 287 | |
4a72ff34 | 288 | char *strstrip(char *s); |
ee9b5e01 | 289 | char *delete_chars(char *s, const char *bad); |
7072ced8 | 290 | char *truncate_nl(char *s); |
ee9b5e01 | 291 | |
4a72ff34 LP |
292 | char *file_in_same_dir(const char *path, const char *filename); |
293 | ||
c32dd69b LP |
294 | int rmdir_parents(const char *path, const char *stop); |
295 | ||
93b5eaec | 296 | int get_process_state(pid_t pid); |
87d2c1ff LP |
297 | int get_process_comm(pid_t pid, char **name); |
298 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line); | |
299 | int get_process_exe(pid_t pid, char **name); | |
7e4ab3c5 | 300 | int get_process_uid(pid_t pid, uid_t *uid); |
901c3d0d | 301 | int get_process_gid(pid_t pid, gid_t *gid); |
3a832116 | 302 | int get_process_capeff(pid_t pid, char **capeff); |
ad450c3e JF |
303 | int get_process_cwd(pid_t pid, char **cwd); |
304 | int get_process_root(pid_t pid, char **root); | |
c593bb36 | 305 | int get_process_environ(pid_t pid, char **environ); |
7072ced8 | 306 | |
bcb92f48 CR |
307 | char hexchar(int x) _const_; |
308 | int unhexchar(char c) _const_; | |
309 | char octchar(int x) _const_; | |
310 | int unoctchar(char c) _const_; | |
311 | char decchar(int x) _const_; | |
312 | int undecchar(char c) _const_; | |
4fe88d28 LP |
313 | |
314 | char *cescape(const char *s); | |
315 | char *cunescape(const char *s); | |
6febfd0d | 316 | char *cunescape_length(const char *s, size_t length); |
5b4c61cd | 317 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix); |
6febfd0d LP |
318 | |
319 | char *xescape(const char *s, const char *bad); | |
320 | ||
4fe88d28 LP |
321 | char *ascii_strlower(char *path); |
322 | ||
44a6b1b6 ZJS |
323 | bool dirent_is_file(const struct dirent *de) _pure_; |
324 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_; | |
87d2c1ff | 325 | |
a34bf9db | 326 | bool hidden_file(const char *filename) _pure_; |
c85dc17b | 327 | |
44a6b1b6 | 328 | bool chars_intersect(const char *a, const char *b) _pure_; |
db12775d | 329 | |
843d2643 | 330 | int make_stdio(int fd); |
ade509ce | 331 | int make_null_stdio(void); |
cd3bd60a | 332 | int make_console_stdio(void); |
843d2643 | 333 | |
b89446bb | 334 | int dev_urandom(void *p, size_t n); |
9bf3b535 | 335 | void random_bytes(void *p, size_t n); |
ef309a68 | 336 | void initialize_srand(void); |
9bf3b535 LP |
337 | |
338 | static inline uint64_t random_u64(void) { | |
339 | uint64_t u; | |
340 | random_bytes(&u, sizeof(u)); | |
341 | return u; | |
342 | } | |
343 | ||
344 | static inline uint32_t random_u32(void) { | |
345 | uint32_t u; | |
346 | random_bytes(&u, sizeof(u)); | |
347 | return u; | |
348 | } | |
d3782d60 | 349 | |
f8b69d1d | 350 | /* For basic lookup tables with strictly enumerated entries */ |
b9a5f858 | 351 | #define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \ |
4e240ab0 | 352 | scope const char *name##_to_string(type i) { \ |
1dccbe19 LP |
353 | if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \ |
354 | return NULL; \ | |
355 | return name##_table[i]; \ | |
b9a5f858 LP |
356 | } |
357 | ||
9cad100e BB |
358 | ssize_t string_table_lookup(const char * const *table, size_t len, const char *key); |
359 | ||
360 | #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \ | |
361 | scope inline type name##_from_string(const char *s) { \ | |
362 | return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \ | |
b9a5f858 LP |
363 | } |
364 | ||
365 | #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \ | |
366 | _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \ | |
367 | _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \ | |
1dccbe19 LP |
368 | struct __useless_struct_to_allow_trailing_semicolon__ |
369 | ||
b9a5f858 LP |
370 | #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,) |
371 | #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static) | |
372 | #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static) | |
373 | #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static) | |
1dccbe19 | 374 | |
f8b69d1d MS |
375 | /* For string conversions where numbers are also acceptable */ |
376 | #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \ | |
377 | int name##_to_string_alloc(type i, char **str) { \ | |
378 | char *s; \ | |
379 | int r; \ | |
380 | if (i < 0 || i > max) \ | |
381 | return -ERANGE; \ | |
382 | if (i < (type) ELEMENTSOF(name##_table)) { \ | |
383 | s = strdup(name##_table[i]); \ | |
384 | if (!s) \ | |
385 | return log_oom(); \ | |
386 | } else { \ | |
8facc349 | 387 | r = asprintf(&s, "%i", i); \ |
f8b69d1d MS |
388 | if (r < 0) \ |
389 | return log_oom(); \ | |
390 | } \ | |
391 | *str = s; \ | |
392 | return 0; \ | |
393 | } \ | |
394 | type name##_from_string(const char *s) { \ | |
395 | type i; \ | |
396 | unsigned u = 0; \ | |
397 | assert(s); \ | |
398 | for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \ | |
399 | if (name##_table[i] && \ | |
400 | streq(name##_table[i], s)) \ | |
401 | return i; \ | |
8511dd18 | 402 | if (safe_atou(s, &u) >= 0 && u <= max) \ |
f8b69d1d MS |
403 | return (type) u; \ |
404 | return (type) -1; \ | |
405 | } \ | |
406 | struct __useless_struct_to_allow_trailing_semicolon__ | |
407 | ||
3a0ecb08 LP |
408 | int fd_nonblock(int fd, bool nonblock); |
409 | int fd_cloexec(int fd, bool cloexec); | |
410 | ||
a0d40ac5 LP |
411 | int close_all_fds(const int except[], unsigned n_except); |
412 | ||
42856c10 LP |
413 | bool fstype_is_network(const char *fstype); |
414 | ||
601f6a1e LP |
415 | int chvt(int vt); |
416 | ||
8f2d43a0 | 417 | int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl); |
6294aa76 LP |
418 | int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4); |
419 | int ask_string(char **ret, const char *text, ...) _printf_(2, 3); | |
80876c20 | 420 | |
512947d4 | 421 | int reset_terminal_fd(int fd, bool switch_to_text); |
6ea832a2 LP |
422 | int reset_terminal(const char *name); |
423 | ||
80876c20 | 424 | int open_terminal(const char *name, int mode); |
af6da548 | 425 | int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout); |
80876c20 LP |
426 | int release_terminal(void); |
427 | ||
428 | int flush_fd(int fd); | |
429 | ||
9a34ec5f LP |
430 | int ignore_signals(int sig, ...); |
431 | int default_signals(int sig, ...); | |
432 | int sigaction_many(const struct sigaction *sa, ...); | |
a337c6fc | 433 | |
5a3ab509 | 434 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path); |
8d567588 | 435 | |
eb22ac37 | 436 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll); |
553acb7b | 437 | int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll); |
8d567588 | 438 | |
8407a5d0 LP |
439 | bool is_device_path(const char *path); |
440 | ||
01f78473 | 441 | int dir_is_empty(const char *path); |
844ec79b | 442 | char* dirname_malloc(const char *path); |
01f78473 | 443 | |
5b6319dc | 444 | void rename_process(const char name[8]); |
2d368c14 | 445 | |
7d793605 | 446 | void sigset_add_many(sigset_t *ss, ...); |
856a5a7d | 447 | int sigprocmask_many(int how, ...); |
7d793605 | 448 | |
344de609 | 449 | bool hostname_is_set(void); |
7c5f152a | 450 | |
f1566e63 | 451 | char* lookup_uid(uid_t uid); |
7c5f152a | 452 | char* gethostname_malloc(void); |
ef2f1067 | 453 | char* getlogname_malloc(void); |
7c5f152a | 454 | char* getusername_malloc(void); |
fc116c6a LP |
455 | |
456 | int getttyname_malloc(int fd, char **r); | |
457 | int getttyname_harder(int fd, char **r); | |
458 | ||
4d6d6518 LP |
459 | int get_ctty_devnr(pid_t pid, dev_t *d); |
460 | int get_ctty(pid_t, dev_t *_devnr, char **r); | |
8c6db833 LP |
461 | |
462 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid); | |
f4b47811 | 463 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid); |
8c6db833 | 464 | |
979ef53a DR |
465 | int is_fd_on_temporary_fs(int fd); |
466 | ||
597f43c7 | 467 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev); |
f56d5db9 | 468 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev); |
ad293f5a | 469 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky); |
f56d5db9 | 470 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky); |
ef2f1067 | 471 | |
1325aa42 LP |
472 | int pipe_eof(int fd); |
473 | ||
82c121a4 LP |
474 | cpu_set_t* cpu_set_malloc(unsigned *ncpus); |
475 | ||
44b601bc LP |
476 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0); |
477 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5); | |
9e58ff9c | 478 | |
5ffa8c81 ZJS |
479 | #define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf)) |
480 | ||
81beb750 | 481 | int fd_columns(int fd); |
72f59706 | 482 | unsigned columns(void); |
8f2d43a0 LP |
483 | int fd_lines(int fd); |
484 | unsigned lines(void); | |
ed757c0c LP |
485 | void columns_lines_cache_reset(int _unused_ signum); |
486 | ||
487 | bool on_tty(void); | |
8f2d43a0 | 488 | |
0b5a519c DS |
489 | static inline const char *ansi_highlight(void) { |
490 | return on_tty() ? ANSI_HIGHLIGHT_ON : ""; | |
491 | } | |
492 | ||
493 | static inline const char *ansi_highlight_red(void) { | |
494 | return on_tty() ? ANSI_HIGHLIGHT_RED_ON : ""; | |
495 | } | |
496 | ||
497 | static inline const char *ansi_highlight_green(void) { | |
498 | return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : ""; | |
499 | } | |
500 | ||
dbc2c080 LP |
501 | static inline const char *ansi_highlight_yellow(void) { |
502 | return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : ""; | |
503 | } | |
504 | ||
c0fdf098 ZJS |
505 | static inline const char *ansi_highlight_blue(void) { |
506 | return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : ""; | |
507 | } | |
508 | ||
0b5a519c DS |
509 | static inline const char *ansi_highlight_off(void) { |
510 | return on_tty() ? ANSI_HIGHLIGHT_OFF : ""; | |
511 | } | |
512 | ||
9d9951a4 HH |
513 | int files_same(const char *filea, const char *fileb); |
514 | ||
b4f10a5e LP |
515 | int running_in_chroot(void); |
516 | ||
72f59706 | 517 | char *ellipsize(const char *s, size_t length, unsigned percent); |
f405e86d | 518 | /* bytes columns */ |
72f59706 | 519 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent); |
8fe914ec | 520 | |
c38dfac9 | 521 | int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode); |
f6144808 LP |
522 | int touch(const char *path); |
523 | ||
97c4a07d | 524 | char *unquote(const char *s, const char *quotes); |
5f7c426e | 525 | char *normalize_env_assignment(const char *s); |
11ce3427 | 526 | |
8e12a6ae | 527 | int wait_for_terminate(pid_t pid, siginfo_t *status); |
820d3acf | 528 | int wait_for_terminate_and_warn(const char *name, pid_t pid, bool check_exit_code); |
2e78aa99 | 529 | |
919ce0b7 | 530 | noreturn void freeze(void); |
3c14d26c | 531 | |
44a6b1b6 | 532 | bool null_or_empty(struct stat *st) _pure_; |
83096483 | 533 | int null_or_empty_path(const char *fn); |
ed88bcfb | 534 | int null_or_empty_fd(int fd); |
00dc5d76 | 535 | |
a247755d | 536 | DIR *xopendirat(int dirfd, const char *name, int flags); |
3b63d2d3 | 537 | |
e23a0ce8 LP |
538 | char *fstab_node_to_udev_node(const char *p); |
539 | ||
21baf21a | 540 | char *resolve_dev_console(char **active); |
f212ac12 | 541 | bool tty_is_vc(const char *tty); |
3043935f | 542 | bool tty_is_vc_resolve(const char *tty); |
44a6b1b6 | 543 | bool tty_is_console(const char *tty) _pure_; |
98a28fef | 544 | int vtnr_from_tty(const char *tty); |
e3aa71c3 LP |
545 | const char *default_term_for_tty(const char *tty); |
546 | ||
e801700e | 547 | void execute_directories(const char* const* directories, usec_t timeout, char *argv[]); |
83cc030f | 548 | |
430c18ed LP |
549 | int kill_and_sigcont(pid_t pid, int sig); |
550 | ||
05feefe0 LP |
551 | bool nulstr_contains(const char*nulstr, const char *needle); |
552 | ||
6faa1114 LP |
553 | bool plymouth_running(void); |
554 | ||
44a6b1b6 | 555 | bool hostname_is_valid(const char *s) _pure_; |
e724b063 | 556 | char* hostname_cleanup(char *s, bool lowercase); |
9beb3f4d | 557 | |
7f0d207d LP |
558 | bool machine_name_is_valid(const char *s) _pure_; |
559 | ||
9beb3f4d LP |
560 | char* strshorten(char *s, size_t l); |
561 | ||
6ea832a2 LP |
562 | int terminal_vhangup_fd(int fd); |
563 | int terminal_vhangup(const char *name); | |
564 | ||
565 | int vt_disallocate(const char *name); | |
566 | ||
424a19f8 | 567 | int symlink_atomic(const char *from, const char *to); |
1554afae LP |
568 | int mknod_atomic(const char *path, mode_t mode, dev_t dev); |
569 | int mkfifo_atomic(const char *path, mode_t mode); | |
34ca941c LP |
570 | |
571 | int fchmod_umask(int fd, mode_t mode); | |
572 | ||
44a6b1b6 | 573 | bool display_is_local(const char *display) _pure_; |
4d6d6518 LP |
574 | int socket_from_display(const char *display, char **path); |
575 | ||
d05c5031 | 576 | int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell); |
4b67834e | 577 | int get_group_creds(const char **groupname, gid_t *gid); |
1cccf435 | 578 | |
4468addc | 579 | int in_gid(gid_t gid); |
43673799 LP |
580 | int in_group(const char *name); |
581 | ||
59164be4 | 582 | char* uid_to_name(uid_t uid); |
4468addc | 583 | char* gid_to_name(gid_t gid); |
59164be4 | 584 | |
8092a428 | 585 | int glob_exists(const char *path); |
8d98da3f | 586 | int glob_extend(char ***strv, const char *path); |
8092a428 | 587 | |
83096483 LP |
588 | int dirent_ensure_type(DIR *d, struct dirent *de); |
589 | ||
034a2a52 | 590 | int get_files_in_directory(const char *path, char ***list); |
83096483 | 591 | |
b7def684 | 592 | char *strjoin(const char *x, ...) _sentinel_; |
911a4828 | 593 | |
b636465b LP |
594 | bool is_main_thread(void); |
595 | ||
01f83c1c JT |
596 | static inline bool _pure_ in_charset(const char *s, const char* charset) { |
597 | assert(s); | |
598 | assert(charset); | |
599 | return s[strspn(s, charset)] == '\0'; | |
600 | } | |
ab1f0633 | 601 | |
94959f0f LP |
602 | int block_get_whole_disk(dev_t d, dev_t *ret); |
603 | ||
e23a0ce8 | 604 | #define NULSTR_FOREACH(i, l) \ |
c4e2ceae LP |
605 | for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1) |
606 | ||
5c0532d1 LP |
607 | #define NULSTR_FOREACH_PAIR(i, j, l) \ |
608 | for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i)) | |
609 | ||
f8b69d1d | 610 | int ioprio_class_to_string_alloc(int i, char **s); |
1dccbe19 LP |
611 | int ioprio_class_from_string(const char *s); |
612 | ||
44a6b1b6 ZJS |
613 | const char *sigchld_code_to_string(int i) _const_; |
614 | int sigchld_code_from_string(const char *s) _pure_; | |
1dccbe19 | 615 | |
f8b69d1d | 616 | int log_facility_unshifted_to_string_alloc(int i, char **s); |
7d76f312 | 617 | int log_facility_unshifted_from_string(const char *s); |
1dccbe19 | 618 | |
f8b69d1d | 619 | int log_level_to_string_alloc(int i, char **s); |
1dccbe19 LP |
620 | int log_level_from_string(const char *s); |
621 | ||
f8b69d1d | 622 | int sched_policy_to_string_alloc(int i, char **s); |
1dccbe19 LP |
623 | int sched_policy_from_string(const char *s); |
624 | ||
44a6b1b6 ZJS |
625 | const char *rlimit_to_string(int i) _const_; |
626 | int rlimit_from_string(const char *s) _pure_; | |
1dccbe19 | 627 | |
f8b69d1d | 628 | int ip_tos_to_string_alloc(int i, char **s); |
4fd5948e LP |
629 | int ip_tos_from_string(const char *s); |
630 | ||
44a6b1b6 ZJS |
631 | const char *signal_to_string(int i) _const_; |
632 | int signal_from_string(const char *s) _pure_; | |
2e22afe9 | 633 | |
8a0867d6 LP |
634 | int signal_from_string_try_harder(const char *s); |
635 | ||
9a0e6896 LP |
636 | extern int saved_argc; |
637 | extern char **saved_argv; | |
638 | ||
65457142 FC |
639 | bool kexec_loaded(void); |
640 | ||
44a6b1b6 | 641 | int prot_from_flags(int flags) _const_; |
87d2c1ff | 642 | |
babfc091 LP |
643 | char *format_bytes(char *buf, size_t l, off_t t); |
644 | ||
8f2d43a0 | 645 | int fd_wait_for_event(int fd, int event, usec_t timeout); |
df50185b | 646 | |
750ef272 | 647 | void* memdup(const void *p, size_t l) _alloc_(2); |
55d7bfc1 | 648 | |
1e5678d0 LP |
649 | int is_kernel_thread(pid_t pid); |
650 | ||
bb99a35a LP |
651 | int fd_inc_sndbuf(int fd, size_t n); |
652 | int fd_inc_rcvbuf(int fd, size_t n); | |
6bb92a16 | 653 | |
9bdc770c | 654 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...); |
6bb92a16 | 655 | |
68faf98c LP |
656 | int setrlimit_closest(int resource, const struct rlimit *rlim); |
657 | ||
ab94af92 LP |
658 | int getenv_for_pid(pid_t pid, const char *field, char **_value); |
659 | ||
a2e03378 LP |
660 | bool http_url_is_valid(const char *url) _pure_; |
661 | bool documentation_url_is_valid(const char *url) _pure_; | |
49dbfa7b | 662 | |
3d7415f4 LP |
663 | bool http_etag_is_valid(const char *etag); |
664 | ||
9be346c9 | 665 | bool in_initrd(void); |
069cfc85 LP |
666 | |
667 | void warn_melody(void); | |
668 | ||
7c5f152a | 669 | int get_home_dir(char **ret); |
2cfbd749 | 670 | int get_shell(char **_ret); |
2fbe635a | 671 | |
a740c14c MS |
672 | static inline void freep(void *p) { |
673 | free(*(void**) p); | |
674 | } | |
675 | ||
dfb33a97 | 676 | static inline void closep(int *fd) { |
03e334a1 | 677 | safe_close(*fd); |
dfb33a97 LP |
678 | } |
679 | ||
dfb33a97 LP |
680 | static inline void umaskp(mode_t *u) { |
681 | umask(*u); | |
763c7aa2 ZJS |
682 | } |
683 | ||
3d94f76c LP |
684 | static inline void close_pairp(int (*p)[2]) { |
685 | safe_close_pair(*p); | |
04d39279 LP |
686 | } |
687 | ||
14bf2c9d LP |
688 | DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose); |
689 | DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose); | |
690 | DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir); | |
691 | DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent); | |
5862d652 | 692 | |
dfb33a97 | 693 | #define _cleanup_free_ _cleanup_(freep) |
dfb33a97 | 694 | #define _cleanup_close_ _cleanup_(closep) |
dfb33a97 LP |
695 | #define _cleanup_umask_ _cleanup_(umaskp) |
696 | #define _cleanup_globfree_ _cleanup_(globfree) | |
1ca208fb ZJS |
697 | #define _cleanup_fclose_ _cleanup_(fclosep) |
698 | #define _cleanup_pclose_ _cleanup_(pclosep) | |
699 | #define _cleanup_closedir_ _cleanup_(closedirp) | |
5862d652 | 700 | #define _cleanup_endmntent_ _cleanup_(endmntentp) |
3d94f76c | 701 | #define _cleanup_close_pair_ _cleanup_(close_pairp) |
c84a9488 | 702 | |
750ef272 | 703 | _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) { |
368504f4 | 704 | if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) |
4b8772bf LP |
705 | return NULL; |
706 | ||
707 | return malloc(a * b); | |
708 | } | |
709 | ||
9489490a DH |
710 | _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) { |
711 | if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) | |
712 | return NULL; | |
713 | ||
714 | return realloc(p, a * b); | |
715 | } | |
716 | ||
750ef272 | 717 | _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) { |
368504f4 | 718 | if (_unlikely_(b != 0 && a > ((size_t) -1) / b)) |
4b8772bf LP |
719 | return NULL; |
720 | ||
721 | return memdup(p, a * b); | |
722 | } | |
0b507b17 | 723 | |
ae6c3cc0 | 724 | bool filename_is_valid(const char *p) _pure_; |
44a6b1b6 ZJS |
725 | bool path_is_safe(const char *p) _pure_; |
726 | bool string_is_safe(const char *p) _pure_; | |
6294aa76 | 727 | bool string_has_cc(const char *p, const char *ok) _pure_; |
cfbc22ab | 728 | |
e3e0314b ZJS |
729 | /** |
730 | * Check if a string contains any glob patterns. | |
731 | */ | |
732 | _pure_ static inline bool string_is_glob(const char *p) { | |
733 | return !!strpbrk(p, GLOB_CHARS); | |
734 | } | |
735 | ||
a9e12476 KS |
736 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, |
737 | int (*compar) (const void *, const void *, void *), | |
738 | void *arg); | |
09017585 | 739 | |
20f56fdd DR |
740 | #define _(String) gettext (String) |
741 | void init_gettext(void); | |
09017585 | 742 | bool is_locale_utf8(void); |
c339d977 MS |
743 | |
744 | typedef enum DrawSpecialChar { | |
6b01f1d3 | 745 | DRAW_TREE_VERTICAL, |
45a5ff0d MS |
746 | DRAW_TREE_BRANCH, |
747 | DRAW_TREE_RIGHT, | |
55c0b89c | 748 | DRAW_TREE_SPACE, |
c339d977 | 749 | DRAW_TRIANGULAR_BULLET, |
3deadb91 | 750 | DRAW_BLACK_CIRCLE, |
6b01f1d3 | 751 | DRAW_ARROW, |
13f8b8cb | 752 | DRAW_DASH, |
c339d977 MS |
753 | _DRAW_SPECIAL_CHAR_MAX |
754 | } DrawSpecialChar; | |
6b01f1d3 | 755 | |
c339d977 | 756 | const char *draw_special_char(DrawSpecialChar ch); |
409bc9c3 LP |
757 | |
758 | char *strreplace(const char *text, const char *old_string, const char *new_string); | |
e8bc0ea2 LP |
759 | |
760 | char *strip_tab_ansi(char **p, size_t *l); | |
240dbaa4 LP |
761 | |
762 | int on_ac_power(void); | |
f74e605f | 763 | |
4cf7ea55 MM |
764 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f); |
765 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f); | |
fabe5c0e | 766 | |
9db11a99 LP |
767 | #define FOREACH_LINE(line, f, on_error) \ |
768 | for (;;) \ | |
f74e605f LP |
769 | if (!fgets(line, sizeof(line), f)) { \ |
770 | if (ferror(f)) { \ | |
771 | on_error; \ | |
772 | } \ | |
773 | break; \ | |
774 | } else | |
9db11a99 LP |
775 | |
776 | #define FOREACH_DIRENT(de, d, on_error) \ | |
777 | for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \ | |
778 | if (!de) { \ | |
8333c77e | 779 | if (errno > 0) { \ |
9db11a99 LP |
780 | on_error; \ |
781 | } \ | |
782 | break; \ | |
a34bf9db | 783 | } else if (hidden_file((de)->d_name)) \ |
9db11a99 LP |
784 | continue; \ |
785 | else | |
cd61c3bf LP |
786 | |
787 | #define FOREACH_DIRENT_ALL(de, d, on_error) \ | |
788 | for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \ | |
789 | if (!de) { \ | |
790 | if (errno > 0) { \ | |
791 | on_error; \ | |
792 | } \ | |
793 | break; \ | |
794 | } else | |
6282c859 MS |
795 | |
796 | static inline void *mempset(void *s, int c, size_t n) { | |
797 | memset(s, c, n); | |
dfb33a97 | 798 | return (uint8_t*)s + n; |
6282c859 | 799 | } |
66e35261 LP |
800 | |
801 | char *hexmem(const void *p, size_t l); | |
2181a7f5 LP |
802 | void *unhexmem(const char *p, size_t l); |
803 | ||
a432cb69 | 804 | char *strextend(char **x, ...) _sentinel_; |
9a17484d | 805 | char *strrep(const char *s, unsigned n); |
392d5b37 | 806 | |
ca2d3784 ZJS |
807 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size); |
808 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size); | |
809 | #define GREEDY_REALLOC(array, allocated, need) \ | |
810 | greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0])) | |
811 | ||
812 | #define GREEDY_REALLOC0(array, allocated, need) \ | |
813 | greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0])) | |
a1937e67 | 814 | |
5c0d398d | 815 | static inline void _reset_errno_(int *saved_errno) { |
5c0aa72a LP |
816 | errno = *saved_errno; |
817 | } | |
818 | ||
2a371001 | 819 | #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno |
5c0d398d | 820 | |
44dd2c6e DH |
821 | static inline int negative_errno(void) { |
822 | /* This helper should be used to shut up gcc if you know 'errno' is | |
823 | * negative. Instead of "return -errno;", use "return negative_errno();" | |
824 | * It will suppress bogus gcc warnings in case it assumes 'errno' might | |
825 | * be 0 and thus the caller's error-handling might not be triggered. */ | |
826 | assert_return(errno > 0, -EINVAL); | |
827 | return -errno; | |
828 | } | |
829 | ||
d6dd604b | 830 | struct _umask_struct_ { |
5c0d398d LP |
831 | mode_t mask; |
832 | bool quit; | |
833 | }; | |
834 | ||
d6dd604b | 835 | static inline void _reset_umask_(struct _umask_struct_ *s) { |
5c0d398d LP |
836 | umask(s->mask); |
837 | }; | |
838 | ||
839 | #define RUN_WITH_UMASK(mask) \ | |
d6dd604b | 840 | for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \ |
5c0d398d LP |
841 | !_saved_umask_.quit ; \ |
842 | _saved_umask_.quit = true) | |
144e51ec CR |
843 | |
844 | static inline unsigned u64log2(uint64_t n) { | |
ec417ccc | 845 | #if __SIZEOF_LONG_LONG__ == 8 |
693eb9a2 | 846 | return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0; |
ec417ccc LP |
847 | #else |
848 | #error "Wut?" | |
849 | #endif | |
850 | } | |
851 | ||
852 | static inline unsigned u32ctz(uint32_t n) { | |
853 | #if __SIZEOF_INT__ == 4 | |
854 | return __builtin_ctz(n); | |
855 | #else | |
856 | #error "Wut?" | |
857 | #endif | |
144e51ec | 858 | } |
79d860fe | 859 | |
7d328b54 | 860 | static inline unsigned log2i(int x) { |
8fe90522 ZJS |
861 | assert(x > 0); |
862 | ||
863 | return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1; | |
864 | } | |
865 | ||
b5de6d98 MS |
866 | static inline unsigned log2u(unsigned x) { |
867 | assert(x > 0); | |
868 | ||
869 | return sizeof(unsigned) * 8 - __builtin_clz(x) - 1; | |
870 | } | |
871 | ||
872 | static inline unsigned log2u_round_up(unsigned x) { | |
873 | assert(x > 0); | |
874 | ||
875 | if (x == 1) | |
876 | return 0; | |
877 | ||
878 | return log2u(x - 1) + 1; | |
879 | } | |
880 | ||
79d860fe MP |
881 | static inline bool logind_running(void) { |
882 | return access("/run/systemd/seats/", F_OK) >= 0; | |
883 | } | |
4b73a0c0 | 884 | |
82da66fb LP |
885 | #define DECIMAL_STR_WIDTH(x) \ |
886 | ({ \ | |
887 | typeof(x) _x_ = (x); \ | |
888 | unsigned ans = 1; \ | |
889 | while (_x_ /= 10) \ | |
890 | ans++; \ | |
891 | ans; \ | |
892 | }) | |
75add28a | 893 | |
4b73a0c0 | 894 | int unlink_noerrno(const char *path); |
ed5c5dbd | 895 | |
82da66fb LP |
896 | #define alloca0(n) \ |
897 | ({ \ | |
898 | char *_new_; \ | |
899 | size_t _len_ = n; \ | |
900 | _new_ = alloca(_len_); \ | |
901 | (void *) memset(_new_, 0, _len_); \ | |
ed5c5dbd | 902 | }) |
95d78c7e | 903 | |
257224b0 | 904 | /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */ |
95d78c7e DH |
905 | #define alloca_align(size, align) \ |
906 | ({ \ | |
907 | void *_ptr_; \ | |
908 | size_t _mask_ = (align) - 1; \ | |
909 | _ptr_ = alloca((size) + _mask_); \ | |
910 | (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \ | |
911 | }) | |
912 | ||
913 | #define alloca0_align(size, align) \ | |
914 | ({ \ | |
915 | void *_new_; \ | |
916 | size_t _size_ = (size); \ | |
917 | _new_ = alloca_align(_size_, (align)); \ | |
918 | (void*)memset(_new_, 0, _size_); \ | |
919 | }) | |
66060897 | 920 | |
63c372cb LP |
921 | #define strjoina(a, ...) \ |
922 | ({ \ | |
923 | const char *_appendees_[] = { a, __VA_ARGS__ }; \ | |
924 | char *_d_, *_p_; \ | |
925 | int _len_ = 0; \ | |
926 | unsigned _i_; \ | |
927 | for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \ | |
928 | _len_ += strlen(_appendees_[_i_]); \ | |
929 | _p_ = _d_ = alloca(_len_ + 1); \ | |
930 | for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \ | |
931 | _p_ = stpcpy(_p_, _appendees_[_i_]); \ | |
932 | *_p_ = 0; \ | |
933 | _d_; \ | |
f39d4a08 HH |
934 | }) |
935 | ||
31885cd5 ZJS |
936 | #define procfs_file_alloca(pid, field) \ |
937 | ({ \ | |
938 | pid_t _pid_ = (pid); \ | |
b68fa010 SP |
939 | const char *_r_; \ |
940 | if (_pid_ == 0) { \ | |
941 | _r_ = ("/proc/self/" field); \ | |
942 | } else { \ | |
943 | _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \ | |
944 | sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \ | |
945 | } \ | |
31885cd5 ZJS |
946 | _r_; \ |
947 | }) | |
d6dd604b | 948 | |
44a6b1b6 | 949 | bool id128_is_valid(const char *s) _pure_; |
d4ac85c6 LP |
950 | |
951 | int split_pair(const char *s, const char *sep, char **l, char **r); | |
7ff7394d | 952 | |
74df0fca | 953 | int shall_restore_state(void); |
295edddf | 954 | |
7ff7394d ZJS |
955 | /** |
956 | * Normal qsort requires base to be nonnull. Here were require | |
957 | * that only if nmemb > 0. | |
958 | */ | |
959 | static inline void qsort_safe(void *base, size_t nmemb, size_t size, | |
960 | int (*compar)(const void *, const void *)) { | |
961 | if (nmemb) { | |
962 | assert(base); | |
963 | qsort(base, nmemb, size, compar); | |
964 | } | |
965 | } | |
74df0fca LP |
966 | |
967 | int proc_cmdline(char **ret); | |
059cb385 | 968 | int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value)); |
1a299299 | 969 | int get_proc_cmdline_key(const char *parameter, char **value); |
bc9fd78c LP |
970 | |
971 | int container_get_leader(const char *machine, pid_t *pid); | |
972 | ||
878cd7e9 LP |
973 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd); |
974 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd); | |
bf108e55 | 975 | |
9f5650ae LP |
976 | bool pid_is_alive(pid_t pid); |
977 | bool pid_is_unwaited(pid_t pid); | |
eff05270 LP |
978 | |
979 | int getpeercred(int fd, struct ucred *ucred); | |
980 | int getpeersec(int fd, char **ret); | |
8e33886e | 981 | |
65b3903f ZJS |
982 | int writev_safe(int fd, const struct iovec *w, int j); |
983 | ||
984 | int mkostemp_safe(char *pattern, int flags); | |
8e33886e | 985 | int open_tmpfile(const char *path, int flags); |
fdb9161c LP |
986 | |
987 | int fd_warn_permissions(const char *path, int fd); | |
6afc95b7 | 988 | |
ac45f971 LP |
989 | unsigned long personality_from_string(const char *p); |
990 | const char *personality_to_string(unsigned long); | |
1c231f56 LP |
991 | |
992 | uint64_t physical_memory(void); | |
6db615c1 | 993 | |
29bfbcd6 | 994 | void hexdump(FILE *f, const void *p, size_t s); |
370c860f DR |
995 | |
996 | union file_handle_union { | |
c5220a94 MO |
997 | struct file_handle handle; |
998 | char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ]; | |
370c860f | 999 | }; |
2695c5c4 | 1000 | #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ } |
c5220a94 MO |
1001 | |
1002 | int update_reboot_param_file(const char *param); | |
6d313367 LP |
1003 | |
1004 | int umount_recursive(const char *target, int flags); | |
d6797c92 LP |
1005 | |
1006 | int bind_remount_recursive(const char *prefix, bool ro); | |
1b992147 LP |
1007 | |
1008 | int fflush_and_check(FILE *f); | |
2e78fa79 | 1009 | |
ae6c3cc0 LP |
1010 | int tempfn_xxxxxx(const char *p, char **ret); |
1011 | int tempfn_random(const char *p, char **ret); | |
c4e34a61 | 1012 | int tempfn_random_child(const char *p, char **ret); |
fecc80c1 LP |
1013 | |
1014 | bool is_localhost(const char *hostname); | |
45035609 LP |
1015 | |
1016 | int take_password_lock(const char *root); | |
5261ba90 | 1017 | |
7629889c | 1018 | int is_symlink(const char *path); |
be57e297 | 1019 | int is_dir(const char *path, bool follow); |
7629889c | 1020 | |
f32d2db1 | 1021 | int unquote_first_word(const char **p, char **ret, bool relax); |
7629889c | 1022 | int unquote_many_words(const char **p, ...) _sentinel_; |
2928b0a8 LP |
1023 | |
1024 | int free_and_strdup(char **p, const char *s); | |
605f81a8 MS |
1025 | |
1026 | int sethostname_idempotent(const char *s); | |
f7c1ad4f LP |
1027 | |
1028 | #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1) | |
1029 | ||
1030 | #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \ | |
0254e944 SL |
1031 | for ((e) = &buffer.ev; \ |
1032 | (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \ | |
f7c1ad4f | 1033 | (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len)) |
72648326 | 1034 | |
0254e944 SL |
1035 | union inotify_event_buffer { |
1036 | struct inotify_event ev; | |
1037 | uint8_t raw[INOTIFY_EVENT_MAX]; | |
1038 | }; | |
1039 | ||
72648326 | 1040 | #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW) |
ee451d76 LP |
1041 | |
1042 | int ptsname_malloc(int fd, char **ret); | |
5f8cc96a LP |
1043 | |
1044 | int openpt_in_namespace(pid_t pid, int flags); | |
4a4d89b6 | 1045 | |
10f9c755 LP |
1046 | ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags); |
1047 | ||
4a4d89b6 LP |
1048 | int fd_setcrtime(int fd, usec_t usec); |
1049 | int fd_getcrtime(int fd, usec_t *usec); | |
1050 | int path_getcrtime(const char *p, usec_t *usec); | |
10f9c755 | 1051 | int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags); |
a354329f LP |
1052 | |
1053 | int same_fd(int a, int b); | |
11689d2a | 1054 | |
45030287 LP |
1055 | int chattr_fd(int fd, bool b, unsigned mask); |
1056 | int chattr_path(const char *p, bool b, unsigned mask); | |
de45d726 | 1057 | |
01b72568 LP |
1058 | int read_attr_fd(int fd, unsigned *ret); |
1059 | int read_attr_path(const char *p, unsigned *ret); | |
1060 | ||
30535c16 LP |
1061 | typedef struct LockFile { |
1062 | char *path; | |
1063 | int fd; | |
1064 | int operation; | |
1065 | } LockFile; | |
1066 | ||
1067 | int make_lock_file(const char *p, int operation, LockFile *ret); | |
1068 | int make_lock_file_for(const char *p, int operation, LockFile *ret); | |
1069 | void release_lock_file(LockFile *f); | |
1070 | ||
1071 | #define _cleanup_release_lock_file_ _cleanup_(release_lock_file) | |
1072 | ||
1073 | #define LOCK_FILE_INIT { .fd = -1, .path = NULL } | |
1074 | ||
de45d726 | 1075 | #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim }) |
ff6a7460 LP |
1076 | |
1077 | ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length); | |
3576d631 LP |
1078 | |
1079 | void sigkill_wait(pid_t *pid); | |
1080 | #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait) | |
3d7415f4 LP |
1081 | |
1082 | int syslog_parse_priority(const char **p, int *priority, bool with_facility); |